Water heater



FIG. 1 is a perspective view of our new design for a water heater;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side elevation view thereof (a left side elevationview thereof is a mirror imgae of the right side elevation view); and,

FIG. 7 is a cross-sectional end elevational view thereof taken on line7-7 of FIG. 2.

Full lines illustrate portions that form parts of the claimed design.Broken lines illustrate portions that form no part of the claimeddesign.

The ornamental design for a water heater, as shown and described. 